When I first heard years ago that circulating coins were minted at West Point but
no mint mark was used, I was mad. I am not mad anymore, but if they made any circulation coins there now, they would have to put a mint mark on them or they would stand out because there was
no mint mark. An interesting thought. I wouldn't be surprised if the mint decided to make quarters with a W mint mark (in rolls only for a premium, of course). They have done strange things before.